Method for low temperature brazing aluminium alloy to obtain brazed joint with high temperature use performance

Abstract

The method for low temperature brazed aluminum alloy to obtain brazed joint with high temperature use performance includes the following steps: 1. setting the brazing alloy inside the brazed gap; 2. primary brazing; and 3. ultrasonic treatment. The said brazing process has no any etching on the aluminum alloy workpiece, short brazing period, low brazing temperature, low operation cost, and capacity of obtaining brazed joint with high strength and high temperature use performance.

Description

technical field

[0001] The invention relates to a welding method. Background technique

[0002] Aluminum alloy has the advantages of low density, high strength and corrosion resistance, so it is widely used in automobiles, high-speed railway vehicles, and aerospace industries. In particular, the price of copper metal materials is soaring. Many traditional copper alloy structural parts have been replaced by aluminum alloys, which makes the application range of aluminum alloys wider than before. As a result, more and more attention is paid to the welding technology of aluminum alloys. The requirements are also more stringent. For aluminum alloy structural parts, ensuring a small amount of denaturation is the key point, so people expect that the lower the welding temperature, the better, TIG welding, MIG welding, laser welding, electron beam welding, diffusion welding and instantaneous liquid phase welding methods There are problems of large deformation after welding and diff...